Update README.md

README.md

@@ -171,35 +171,33 @@ for example in dataset:
   "reading_time": 1,
   "format": null,
   "complexity": null,
-  "comments": [
-    {
-      "id": 11653537,
-      "parent_id": null,
-      "level": 0,
-      "time_published": 1185963192,
-      "score": -1,
-      "votes": 1,
-      "message_html": "...",
-      "author": "...",
-      "children": [
-        11653541
-      ]
-    },
-    {
-      "id": 11653541,
-      "parent_id": 11653537,
-      "level": 1,
-      "time_published": 1185967886,
-      "score": 0,
-      "votes": 0,
-      "message_html": "...",
-      "message_markdown": "...",
-      "author": "..."
-    }
-  ]
+  "comments": {
+    "id": [11653537, 11653541],
+    "parent_id": [null, 11653537],
+    "level": [0, 1],
+    "time_published": [1185963192, 1185967886],
+    "score": [-1, 0],
+    "votes": [1, 0],
+    "message_html": ["...", "..."],
+    "author": ["...", "..."],
+    "children": [[11653541], []]
+  }
 }
 ```
 
+You can use this little helper to unflatten sequences:
+
+```python
+def revert_flattening(records):
+    fixed_records = []
+    for key, values in records.items():
+        if not fixed_records:
+            fixed_records = [{} for _ in range(len(values))]
+        for i, value in enumerate(values):
+            fixed_records[i][key] = value
+    return fixed_records
+```
+
 
 ## Source Data